I wouldn’t specially crave for the Kaya toast from Tong Ah given that there are so many other convenient local chains which serve this dish. That said, if you are in the Keong Saik vicinity or having a staycation at Kesa House, this is one good and cheap local breakfast option.
Tong Ah Eating House also serves Crispy Thin Toast Kaya, French Toast with Kaya and Steamed Bread with Kaya (S$4.90).
Coffee was a pretty thick local brew, but it's not especially fragrant. Which works for some people but not quite so for me because the strength is just one half of the quality I look for.